Printing telegraph



(No Model.\ 5 Sheets-Sheet 1.

G. B. SCOTT.

PRINTING TELEGRAPH.

No. 274,665 Patented Mar.27,1883.

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(Ho Model'.)

G. B. SCOTT.

PRINTING TELEGRAPH.

Patented Mar.27, 1883.

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' G. B. SCOTT.

PRINTING TELEGRAPH. No. 274,665. Patented M81227, 1883;

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(No Model.) 5 Sheets-8hee11 4.

G. B. SCOTT.

PRINTING TELEGRAPH.

N0.2'74,665. Patented Mar.27,18'83. dig-4- .2 1 V 0 Z P a Non/10am. 5sheets-sheet 5.

G. B. SCOTT.

PRINTING TELEGRAPH. No. 274,665. Patented M31227, 1883.

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PATENT GEORGE B. SCOTT, OF BROOKLYN, NEW YORK.

PRINTING-TELEGRAPH.

SPECIFICATION forming part of Letters Patent No. 274,665, dated March27, 1883.

Application filed October 9, 1882. (No model.)

Printing-Telegraphs, of which the following is a specification.

Printing-telegraphs have been made with one line-wirefor the pulsationsthat set the type-wheel and another line-wire for the printing-magnet.

I make use of four line-wires and magnets operating switeh-armaturesinsucha manner as to direct an electric current to the proper magnet inthe receiving-instrument to move a stop that arrests the rotation of thetype-wheel at the proper place for the given letter to be printed. Bythe-use of four line-wires, and by permutating the circuit-connections,I am'able to direct the current in such a manner to the instrument thatI can operate either one of the forty-eight steps, or less, and therebyarrest the type-wheel at the desired letter. If a'typewheel with onlythe ordinary letters is employed, the same may be operated by a lessnumber of wires-say three-by perinutatin g the switch-connections.

I- will first describe the peculiarities of the instrument and then thecircuit-connections.

Figure 1 is a diagram representing the instrument. Fig. 2 is a diagramof the circuitconnections at one receiving-instrument, and

Fig. 3 is a diagram of five of the keys and connections at thetransmitting-station.

The type-wheel A is presumed to have fortyeight characters. These areshown in a row along the bottom part of Fig. 2. Theyrepresentthe lettersof thealphabet,numerals, fractions,;hundreds, thousands, punctuations,and a blankspace fordiv-iding words and sentences. The two We, one abovethe other, 8, as shown, can be printed by one impression, and representhundreds, and three Os, one above the 0 other, are also printed by oneimpression,

5o toothed wheel, I), with forty-eight-(48) spaces.

. character that has to be printed.

| The printing-lever B has upon it the printingroller 0, and anysuitable device for feeding the paper. It also has a tooth, d, thatenters the spaces between the teeth of b and prevents the type-wheelrotating. The spring e performsthe printing. It also holds theprintinglever B with its tooth d in b until the magnet 0 draws theprinting-lever down.

- There is upon the type-wheel shaft an arm, 2', and around the pathdescribed by this arm there is a ring or frame,'g, with forty-eight (48)radial stops, h. Each stop is made. to slide freely in itssupporting-ring, and there is a delicate spring, k, that is adjusted'todraw the stop outwardly, and upon the stoprod is an armature, 0, andthere is a small magnet, 1,

these radial stops and their appliances are shown.

A spring or weight-power and train of gearing are employed to tendconstantly to rotate the type-wheel shaft. The same, however, is held bythe tooth cl. When a current is directed as hereinafter-described, itreaches the magnet l, that is apportioned to the letter or The armatureo is attracted and the stop It moved inwardly to the path of the arm i.The current passes onward through 0, drawing down the printing-lever B,liberating the type-wheel, which is turned around until its arm i isstopped by 72-. As the current ceases, the spring 6 (which is properlyadjustedto act before l releases 0) draws up the printing-lever, givingthe impression and holding the typewheel for the next operation. stoodthat the paper-feed should take place as the lever B is drawn down bythe magnet O.

I will now describe the circuits and switchmagnets, and remark that thewires in Fig. 2 are represented as passing through the row of magnets Z,which, for convenience, are shown in a straight row, instead of being ina circular range, and the magnet C is also represented with itsground-connection and acircuit-wire from the range of magnets Z to thehelix-wire of 0; hence a current passing through either thence to theground.

In operating stock-reporting telegraphs to each stop. In the drawingsbut three of ltis to be underof the helices 1 goes from there through 0,and

is usual to have a number of instruments in one circuit. I thereforehave represented the line-wires 1'1 l l as continuing on, so as to go tothe next instrument.

At the central or sending station a transmitting-instrument is provided.It may be'of any desired construction, usually with keys, the same beingof suitable character to produce the proper circuit-connections tobatteries and to the line, and the batteries are arranged, in connectionwith the transmitting-keys, so as to select and send the proper currentby each key to operate the instruments at the receiving-station. I haveshown in the diagram Fig. 3 five of the keys at the central ortransmitting station to illustrate the mode of operation, When any keyis depressed it puts upon the line Z a current which ultimately reachesone of the magnets l. The intermediate magnetic switchesat eachprinting-instrument direct the current and determine which letter of thetypes shall be printed.

Upon the line-wires l l and l a positive or a negative current can beapplied, and that ourrentcan bestrongor weak. Henceeach wire can beinoneoffourconditions-viz, strong or weak, strong or weak-and the keys atthe transmitterselect and permutate these currents totherespectivelines. ThepolarizedrelayP is in the line 1 and its tonguein the line I. The polarized relays P are in the line Z and theirtongues in the branches 20 21. relays P are in the line i and theirtongues in the branches 22 23 24 25. The row of electromagnets M is inthe line 1 and their armatures respond to strong currents, but theirsprings prevent them responding to weak currents. The electro-magnets Nin the next row below have their helices in the line 1 and they respondto strong currents only. The helices of the row of electro-magnets O arein the line 1*, and they respond to strong currents only.

By observing the back and front stops of the electro-magnets M N O andthe connections from them, and by presuming that currents will move thepolarized tongues of P P and P to the left and currents to the right thecircuits can be traced as follows: Suppose thekey A puts to l a weakcurrent, to l a weak current, to 1 a weak current, then the current fromZ goes by tongue of P to 20, and by P to 22, and by P to 26, and.

the constant current from Z to go by tongue of P by 20 to P and by 22 toP and by 30 to M and 31 to N, and by 33 to O, and by 34 to magnet Z, andstops type-wheel at K. Suppose, now, that key for type 6 is depressed,it

puts on line l a weak current or strong current, on line Z a strongcurrent, and on The polarized line Z a weak current. These currents,acting in the respective relays, close the circuit-connections, so thatthe current travels from Z by tongue of P and 21 to P and by 24 to P andby 35 to M, and by 36 to N, and by 37 direct to magnetl on printerallotted for 6.

It will be seen that with the connections to G F L R U X 3 6 9, &c., themagnets 0 do not act to change thecircuits. Hence it makes no differencein selecting the permutating-currents for those letters whether weak orstrong currents are sent. By following out the circuit-connections, asshown, and bearing in mind the action of the positive, negative, andincrease currents on the respective lines, and the different operationsperformed by each, an electrician will have no difficulty in selectingthe particular character of currents to be sent on the different linesin order to change the armature-switches to right or left and direct thecurrent to the particular magnet of the printer corresponding to the keythat is depressed.

It is to be borne in mind that the ranges of electro-magnets M N 0 workonly by increase of strength of current, moving the switch-armatures tothe right. The armature-switches remain closed by their springs to theleft when weak currents are sent. On the other hand, the polarizedinstruments 1? P 1? respond to change of polarity, regardless ofstrength.

In the illustration of the keys I have shown the four line-wires asconnected to the pivots of armatures and the front stops connected tolines marked strong. weak, strong weak, so as to select from therespective wires the current required for the respectivelines.

Upon reference to Fig. 3 it will be seen that when one key is depressedthe local circuit passing through all four of the electro-mag netsallotted to that key is closed. Hence the armatures of all such magnetswill be moved and close the circuits to the respective linewires 1 Z Zl, and the proper current will be sent upon each line, because thebranch wires, coming to the respective front stops of theelectro-magnets, lead to thesource of the properelectric current, sothat if the key A is closed the line 1 is connected to the constantcurrent, the line 1 to a weak current, the line Z to a weak current, andthe line 1 to a weak current.

v The connections for the other keys will be made upon the principlesbefore explained,so that by permutating the currents in polarity andstrength to the different lines the switches at thereceiving-instruments will be operated as aforesaid.

The keys A B C, 850., (shown as having contacts both above and below thekeys when in a normal position,) have the local circuit from battery L Bpassing from bottom stop of one to pivot of next key. Hence thedepression of any one key breaks the circuit to those beyond,'but closesit to its own relay-magnets R M Any desired circuit-closing key maybeemployed, with as many contacts as there are lines, so as to dispensewith relay-magnets. I have shown two such keys in-Fig. 7, in which itwill be seen that when the key is depressed connections are made totherespective wires and currents sent over the various lines of thestrengths required to direct the constant current to the magnet of theproper letter. To illustrate. When A is depressed the constantbattery-current will be connected to line-wire Z and the weak currentwill pass to lines Z Z Z to operate in the manner before'described. Whenkey B is depressed connections are made between line Z and constantbatterycurrent, between i and Z with weak current, and between Z andstrong current. These illustrate the manner in whichthe connections arepermutatedto send the required currents upon each line-wire.

The adjustments 'of the springs to the relayarmatures are such that thecurrent to the printing-instrument over line Z is the last to close, sothat the currents in the other lines close first to prepare the way forthe current on Z by moving the switches. vIt the fourth line, Z4, isdispensed with, the connections can be made from the polarized relays Pdirect to four'of the magnet-switches N, and the currentcan be switchedby N to eight of the magnet-switches O, and thence to one of sixteenplaces. In Fig. 4 such an arrangement of the circuits isrepresented,from which it will be seen that by the use of positive ornegative and strong or weak currents in the lines Z Z, in the mannerbefore described, the constant current from Z will be sent through thearmatures of the polarized magnets P P to one of the armatures of themagnets N, thence to one of the armatures of O, and to the requiredhelix Z, according to the respective currents sent on said lines Z Z asbefore explained.

If the lines Z andZ and theirinstruments are dispensed with, the currentmaybe directed by P to two of the'magnets O, and by their switches toone of four places,as seen in the diagram Fig.5. In this case thecurrent on Pmay be or weak or strong. the current will be diverted tothe right or left armature of the magnets O by the polarized magnet Pand with weak currents the spring of such armature will not be overcome,and the current from Z will pass to thehelix Z, that is in circuit withthe back stop. When strong currents are used the spring will be overcomeand the contact made with the front stop to send the current through thehelix Z, that is in contact therewith.

Itwill be'apparent by reference to Figs. 2

' and 3 that the method of directing a current By the change of polarityother electric appliances, and that this feature of iny invention is notnecessarily limite toprinting-telegraphs.

By the arrangement shown sixteen more sig nals may be obtained byplacing magnet-armatures and switch-connections in the wirescorresponding to the wire 37, as illustrated in the diagram Fig. 6, andby using five linewires instead of four and duplicating thecircuit-connections the number of branch wires may be increased inproportion. I

In the diagram Fig.3 a representation is made of a battery, so as toindicate the polarity andstrength of current. It is to be understoodthat the currents frorn dynamdmachines may beused, or the batteriesarranged in any -of stops corresponding tothe divisions in thetype-wheel, and electro-magnets for operating said stops, substantiallyas set forth.

2. The combination, with the type-wheel and means for revolving thesame, of a stop'on the type-wheel shaft, a circular range of stops,electro-magnetsfor operatingthe same, a printing-lever, a tooth on thesame, and a toothed wheel on the type-wheel shaft, substantially as "setforth.

3. The combination, with the type-wheel, its shaft, stop, andtooth-wheel, of a printing-lever, a spring to give the impression, atooth to hold the type-wheel, and an electro-magnet to draw down thelever, substantially as set forth.

4. The combination, with a type-wheel and its stop, of a circular rangeof stops, electromagnets to operate the same,-and' transmitting-keys,lines, and polarized and electro-magnetic switches to direct thecurrent, substantially as set forth. 1

5. In combination with two line-wires, Z 1 and means for sending uponthe line-wires Z currents of varying strength and of positive ornegative polarity, a polarized switch, 1?, and the magnetic switches O,and circuit-connections, substantially as set forth, for directing thecurrent of the line Z to one of several places, substantially asspecified.

6. The combination, with three line-wires, of polarized switches andmagnetic switches in the second and third line-wire circuits, and meansfor varying the strength of currents and the polarity on the said secondand third linewires, whereby the current from the first line isdirected, substantially as set forth.

7. The combination, with four line-wires, of

polarized switches and magnetic switches in the second, third,and fourthline-wire circuits, I to represent thousands, substantially as set IOand. means for varying the strength of currents forth.

and the polarity on the said second, third, and Signed by me this 4thday of October, A. D. fourthline-wires, whereby the current from the1882.

first line-wire is directed, substantially as set GEO. B. SCOTT. forthWitnesses S. In a printing-telegraph, a typeuvheel hav- CHAS SMITH ingtwo 015, 3,) one above the other,to represent J HA'IB hundreds, or threeOs, one above the other,

